On 2013-12-18, Adrian P wrote:
...
>
> Everywhere is written that FreeBSD is the best OS for time keeper,
> since its kernel supports nanosecond accuracies. However, if GPS 18x
So does Linux.
But the interrupt processing ( and eventhe clock reading times) are
nowhere near that accurate. The inte
On 2013-12-18, Adrian P wrote:
>> It is hard to say, but it could be that the interrupt for the PPS is
>> delayed because of, say, disk activity which ties up the interrupts for
>> 50us. The next one will of course occur on time ( ie 50us early with
>> respect to the previous interrupt). That may
>
> Have you configured laptop power saving + sleep + hibernate features off in
> the BIOS and OS?
>
Hmm, Power mode for AC was set to Maximum Performance. I do not really
know what that means, so I will customize it so that HDD off timer and
suspend timer are both disabled, then run the test aga
>
> In addition to what the others have suggested, does you GPS 18 LVC have
> a good view of the sky? It's nothing like as sensitive as the newer 18x
> LVC (note the "x").
>
> If it helps to compare, the data from my own Intel Atom FreeBSD 8.2
> system is here - PC Pixie:
>
>http://www.satsign
> It is hard to say, but it could be that the interrupt for the PPS is
> delayed because of, say, disk activity which ties up the interrupts for
> 50us. The next one will of course occur on time ( ie 50us early with
> respect to the previous interrupt). That may be what you are seeing. Are
> you lo
In article , st...@ntp.org says...
>
> DaveB writes:
> > ...
> >
> > I then looked up kldload as suggested, and did this
> >
> > # /boot/kernel >kldload -v ./pps.ko
> > Loaded ./pps.ko, id=3
> > # /boot/kernel >kldstat -q
> > Id Refs AddressSize Name
> > 17 0xc040 1205064 k
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/svn.html
which IMO tries ti civer too much with too little, but it shouldget you
started. You might want to add:
SVN_UPDATE= yes
SVN=/usr/local/bin/svn
to /etc/make.conf, and you might need to install the svn port first.
